Machine element or mechanism – Gearing – Interchangeably locked
Patent
1976-08-20
1978-02-14
Scott, Samuel
Machine element or mechanism
Gearing
Interchangeably locked
74365, 74375, 74625, 346139R, F16H 308, F16H 100, G01D 1518
Patent
active
040731987
ABSTRACT:
In a device such as a spectrophotometer with an associated chart recorder in which the speed ratio between a first displaceable member and a second displaceable member may be selectively changed within a predetermined range of speed ratios, in a first embodiment of invention which is mechanical in nature, a number of gear trains in constant mesh with each other are provided to obtain the different speed ratios. Each of the gear trains has associated therewith a rotary disc with circumferentially even spaced apertures, the gear train obtaining an input from the first displaceable member by means of arms rotatable concentric with the discs, the arms carrying a pin adapted to enter into positive engagement with any one aperture, the number apertures depending on the scale served by the associated gear train. In a second, electrical embodiment equivalent operation is obtained by maintaining counts in counters of the position where the second displaceable member would be for each of the given scales along with maintaining a count of the actual position with comparator means used to bring the actual count into correspondence with the desired count when a scale change takes place.
REFERENCES:
patent: 2100936 (1937-11-01), Bonn, Jr.
patent: 2647411 (1953-08-01), Filocamo
patent: 2675710 (1954-04-01), Ruhland
patent: 2701479 (1955-02-01), Kuntny
patent: 2753736 (1956-07-01), Mitchell
patent: 3084563 (1963-04-01), Fischer
patent: 3145578 (1964-08-01), Kampf
patent: 3162058 (1964-12-01), Matthew
patent: 3183735 (1965-05-01), Boreen et al.
patent: 3229540 (1966-01-01), Baranowski, Jr.
patent: 3280651 (1966-10-01), Hermann
Chandler Lance W.
Giarratana S. A.
Grimes E. T.
Masselle F. L.
Perkin-Elmer Limited
LandOfFree
Apparatus for changing the speed ratio between first and second does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus for changing the speed ratio between first and second , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for changing the speed ratio between first and second will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-519431